someone who is easily capable of farting and knows how to shit themselves while doing it in a proper manner.

bob: hey guy arent you oging to the party tonight.
guy: no have to go to this meeting with my fartcaging
bob: no you dont
guy: yes
bob: fine then dont ask me to be your fartcag.
guy: i wont you asshat.
bob: ok bye i thought you were leaving
guy: I am, now bye i need to rehearse
bob: what your ass tunes
guy: no your mom
bob: we will meet again
guy: yea in your moms bedroom
bob: ok you punkaroo now leave
guy: ok, tootles